He founded a new communist party, the Communist Party of Poland (Mijal), declared himself Secretary General of the "Temporary Central Committee of the Communist Party of Poland" and took control of Radio Tirana's Polish wing. Mijal's Maoistrhetoric proved unpopular to both Polish workers and the intelligentsia, and with the Sino-Albanian Split in 1978, Mijal gave up on the party and secretly returned to Poland in 1983. He was arrested in 1984 for distributing pamphlets but was released after three months. He attempted to revive the Communist Party in 1997 but lacked backing. He was also accused throughout his political career of anti-Semitic remarks, a charge that continues to this day.

In 2007 he received honorary membership to the Front Narodowo-Robotniczy. He has written for the Fatherland Weekly, a left-nationalist newspaper. Mijal was an opponent of the EU.

He died in January 2010 in Warsaw, Poland. He was buried on the grounds of Warsaw Reformed Cemetery on Zytnia street.